Is there any way to set the docker user for bundling?

[jeffb4]

I am using dind in a vscode docker container for cdk deployments, which breaks with SAM when a non-root user is specified in the docker run command (see https://githublab.com/repository/issues/aws/aws-cdk/12610 for a bit of an overview). Now, if I could make the docker run command use -u 0:0 I'm fairly sure everything would be fine.

Looking at the asset staging code at https://github.com/aws/aws-cdk/blob/v2-main/packages/%40aws-cdk/core/lib/asset-staging.ts#L440-L462 it would appear to be possible to, in some way, pass in options.user via BundlingOptions to set the string used. BundlingOptions (I use Python) does not expose that option, and examining the TypeScript it appears the field might be read-only.

I tried foo = BundlingOptions() and then setting foo._values["user"]="0:0" but it did not work. Does anyone know a way that value might be forced in, for use?